Home / 85,915,693.11-128,703,477.72-75,145,155.51

Finding the Fourth Proportional to 85,915,693.11, 128,703,477.72 and 75,145,155.51

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Solution

The fourth proportional to 85,915,693.11, 128,703,477.72 and 75,145,155.51 is: 112,568,990.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915,693.11 : 128,703,477.72 = 75,145,155.51 : x
  2. Step 2: Convert to fraction form
    85,915,693.11/128,703,477.72 = 75,145,155.51/x
  3. Step 3: Cross multiply
    85,915,693.11x = 128,703,477.72 × 75,145,155.51
  4. Step 4: Simplify right side
    85,915,693.11x = 9,671,442,847,947,220
  5. Step 5: Solve for x
    x = 9,671,442,847,947,220/85,915,693.11
  6. Step 6: Final answer
    x = 112,568,990.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.